Method, apparatus, and storage medium for encoding/decoding multi-resolution feature map

A decoding method, comprising:

• generating packed feature maps by decoding an input bitstream;
• and
• generating a multi-resolution feature map by performing unpacking on the packed feature maps,
• wherein the multi-resolution feature map includes a high-resolution feature map and a low-resolution feature map, and the input bitstream includes a residual value between an original low-resolution feature map and a compensation feature map generated by encoding and then decoding the original low-resolution feature map, and
• wherein the high-resolution feature map is configured such that compression damage, corresponding to the compensation feature map, is compensated using the residual value,
• wherein the residual value represents compression damage generated during encoding and decoding of the original low-resolution feature map,
• wherein the decoding method further comprises upsampling the residual value associated with the low-resolution feature map, and
• wherein the high-resolution feature map is generated by applying the upsampled residual value to compensate compression damage in a feature map having a higher resolution than the low-resolution feature map, thereby propagating compression damage from the low-resolution feature map to the high-resolution feature map.